POROTHERM is an aerated, honeycomb-matrix, clay block (not brick) walling system. Simple and fast construction requires only clay block, concrete and steel, with a finished render. It’s not a cladding system, but a structural walling system.
Developed by Wienerberger, Europe’s largest manufacturer of clay construction materials, it is now used in up to 80% of commercial and residential construction in Europe. Used for hundreds of years globally for its amazing performance and durability, its use is fast gaining popularity worldwide.

With more than 20 POROTHERM projects here in New Zealand at various stages of planning and completion, POROTHERM is gaining recognition in the NZ building market.
Cost per m2 is comparative to a 140mm timber frame build. Seismic AND fire-resistant, durable, breathable, and 100% natural. The block has a design life of 150 years and material life of 400+ years. Average block thickness of 250mm, R-values between 1.7 – 5.4. Thermal mass in POROTHERM walls provide warmth in winter and cooling in summer to create an all-year-round living temperature between 18-22C. Near zero energy and maintenance requirement.

For more information about Porotherm Clay Block Range… 
Porotherm R25 Th+ Clay Block
Porotherm R25 Th+ Clay Block
Porotherm R25 Column/ Portal Clay Block
Porotherm R25 Lintel Clay Block
Porotherm Clay Block R15
Porotherm Clay Block R15
Porotherm Clay Block R25Th+, R15 and R25 Column
Porotherm Clay Block R25 Column, R15 and R25 Lintel
Porotherm Clay Block R25Th+
CLIMAmur Clay Block
Browse past, current and future projects here in New Zealand… 
Stellaria NZ - Wienerberger Porotherm Projects - Karapiro Boathouse

Karapiro Boathouse

Stellaria NZ - Wienerberger Porotherm Projects - Karapiro Project 450x450

Karapiro Project

Te Awamutu NZ Porotherm Project - Main image

Te Awamutu

Putaruru Porotherm NZ Project - main image


East Tamaki Project - main image

East Tamaki

Martinborough Project


Rototuna NZ Project - main image


Stellaria NZ - Wienerberger Porotherm Construction Clay Block - New Zealand Project Building Site - Taupo Project - HomeStar

Taupo Project

Mangawhai NZ Porotherm Project - main image

Mangawhai Project

Hawkes Bay Porotherm Project

Hawkes Bay Project

400x400 New Zealand Block House - StellariaNZ - Wienerberger Porotherm Clay Block Construction - Construction Site - Queenstown

Queenstown Project

Brochures, Catalogues and Additional Information
Click on the image to download

Stellaria NZ - Company Profile 2019 Cover PageStellaria NZ – Company Profile (PDF)

Wienerberger Porotherm CatalogueWienerberger Porotherm – NZ Products (PDF)

Porotherm R25 Th+ Brochure - Cover PagePorotherm R25 Th+ (PDF)

Porotherm Clay Block
‘New Generation’ Alternative
Construction System (PDF)

Porotherm Clay Block Declare Label 2020Porotherm Declare Label 2020 (JPG)

CLIMAmur 30 BrochureCLIMAmur 30 (PDF)

Climamur 36 BrochureCLIMAmur 36 (PDF)

CLIMAmur 42 Stellaria NZCLIMAmur 42 (PDF)

Porotherm Clay Block in Brief

Affordable Icon

Cost Effective Build Price

Finished wall price per m2 competes with high-end timber-frame construction.
High Future Value Icon

High Future Value

Low maintenance and low energy costs will give a yearly high capital return.
Multiple-Purpose Use Icon

Multi-Purpose Use

Porotherm clay block is ideal for all building types.
Ecological Icon - Stellaria NZ


Porotherm is 100% natural pure kiln-fired clay. No toxicity, synthetics or nasties.
Breathable Icon

Fresh & Clean

Porotherm keeps the air inside your home fresh, it allows air to ‘permeate’ and move back and forth through the block walls.
Sustainable Construction Icon

Sustainable Construction

Porotherm uses 95% less water and produces 45% less waste than concrete construction.
Thermal Efficiency Icon

Thermal Efficiency

Designed as a thermometric regulator, Porotherm keeps an even 18-22C indoor temperature.
Fire Resistance Icon

Fire Resistance

Porotherm is non-combustible and achieves an A1 fire-resistance rating.
SoundProof Icon

Sound Proof

Thick walls provide a peaceful private living environment.
Moisture Management Icon

Moisture Management

No condensation, humidity, mould or dampness – completely dry.
Earthquake Icon

Very High Seismic Performance

Design-engineered to meet the world’s highest seismicity requirements.
Low Maintenance Icon

Low Maintenance

Near-zero maintenance required for years to come.
Simple and Easy to Install Icon

Easy & Simple to Install

Block laying time can be 4x faster than traditional masonry.
Durability Icon


Porotherm clay blocks have a design life of at least 150 years.
Declare Accredited Icon

Declare Accredited

100% organic – no Volatile Organic Compounds (VOC).

Wienerberger Porotherm in Numbers

Different types of Porotherm blocks*

Largest Porotherm block*

Lightest Porotherm block*

Heaviest Porotherm block*

*Available in New Zealand.